Core lifter



, Mar. 20, 1923. 11,448,885.

J. WALKER.

CORE LIFTER.

man 0cT.19, I922.

Patented lit liar. an. MR3.

JOHN WALKER, HONOLULU, HAWAII.

CORE LIFTER.

Application filed October 19, 1922.

To all whom it may concern:

Be it known that 1, JOHN lVALirnn, a citizen of the United States. residing at l-lonolulu, in the Territory of Hawaii, have invented certain new and useful Improvements in Core Lifters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it. appertains to make and use the same.

The invention relates to a new and useful. form of apparatus for lifting or withdrawing the cores from molds. and is particularly adapted for co-operation with multiple tile molds of the type disclosed in my co-pending application Serial No. 583,018, filed August 19th, 1922, the device comprising an open frame to straddle the mold, having a lever of the first class loosely fulcrumed on the frame, a hook pivoted at one end of said lever adapted to engage the core and release the same by a straight upward pull, so that the lever and the core may be withdrawn after the core has been initially or partially separated from the casting.

The invention is illustrated in the accompanying drawings, in which Fig. 1 is a perspective view of the core lifter in co-operative engagement with a core of the multiple mold;

Fig. 2 is a similar view of the core lifter per se;

Fig. 3 18 core.

Referring to the drawings, 1, 1, indicate the longitudinal or side members of the rectangular frame provided with end members 2 and 3, the frame being secured firmly together by cross bolts l. About midway of each of the members 1, 1, there is secured a standard or block 5, the two blocks constituting the fulcrum for the lever of the lifting device. The frame is made of sufiicient size to straddle or overlie the top of a mold section. with sufiicient space between the frame men'ibers to permit the mold core to be with drawn and lifted free of the mold through the frame.

(lo-operating with the portable frame is a lever 6 provided with a cross bar 7 near one end, adapted to span the space between the blocks or pedestals 5, 5, and to rock freely on the tops of said pedestals. Pivoted by a pin or bolt 10 to the short end of the lever 6 a link 8 having an angularly disposed end 9, constituting a hook adapted to engage an a perspective view of a typical Serial No. 595,593.

appropriate part of the core, such as the cross bar of the particular core illustrated in Fig. 3, and lift the core to initially free the same from the mold when the long arm of the lever 6 is depressed, the loose connection between the cross-shaft 7 of the lever and the standards 5 and the pivoted connection between the hook and the lever admitting of the core being withdrawn by a straight upward pull, so that the interior of the casting will not be marred or damaged, as is frequently the case when the core has to be tapped loose from the casting and withdrawn without special reference to a straight upward pull.

it will be particularly noted that the lifting device is so constructed and arranged that it is readily moved from place to place and may be quickly moved into position along the top of the multiple mold frame without disturbing any of the parts thereof. Furthermore. inasmuch as the lever is loosely associated with the framework, after the core has been lifted free of engagement with the sides of the casting, the lever and the core may be lifted together entirely free of the mold frame and the frame of the lifting device.

What I claim is:

1. A lifter for mold cores comprising an open rectangular frame having standards on opposite sides thereof, a lever of tie first class fulcrumed on said standards, and a hook pivoted to one end of the lever and adapted to engage the core.

2. A lifter for mold cores comprising an open rectangular frame having standards on opposite sides thereof, a lever of the-first class loosely and removably fulcrumed on said standards, and a hook pivoted to one end of the lever and adapted to engage the core.

3. A lifter for mold cores comprising an open frame to straddle the core, a lever having a cross shaft intermediate its length loosely engaging the side members of said frame, and a hook pivoted to one end of the lever and adapted to engage the core.

4. A lifter for mold cores comprising an open frame having standards on opposite sides thereof, a lever having a cross shaft intermediate its length loosely engaging said standards, and a hook pivoted to one end of said lever and adapted to engage the core.

In testimony whereof I aflix my si 7 ature.

Y JOHN WALKER. 

